Divided driving pulley and the like of sheet-metal construction



May 8, 1923. 1,454,435 E. GARSIDE DIVIDED DRIVING PULLEY AND THE LIKE OF SHEET METAL CONSTRUCTION Filed Oct. 22 1920 3 Sheets-Sheet 1 May 8, 1923. 1,454,435

E. GARSIDE DIVIDED DRIVING PULLEY AND THE LIKE OF SHEET METAL CONSTRUCTION Filed Oct. 22 1920 3 Sheds-Sheet 2 May 8, 1923. f

E. GARSIDE DIVIDED DRIVING PULLEY AND THE LIKE OF SHEET METAL CONSTRUCTION 3 Sheets-$110 5 Filed Oct. 22 1920 Patented May 8, 1923.

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EDMUND GARSIDE, F DAaLINeTomENe AND, AssreNoa 'ro JOHN HENRY MORGAN, 0E SHEFFIELD, ENGLAND, AND TO THE sx ENE worms LIMITED, or DARLING- TON, ENGLAND, e CORPORATION OF GREAT BRITAIN AND IRELAND, AND HIMSELF.

DIVIDED DRIVING PULLEY AND THE LIKE 0F SHEET-METAL CONSTRUCTION.

Application filed October 22,1920.

To all whom it may concern:

Be itknown that I, EDMUND GARsIDE, subject of the King of Great Britain and Ireland, residing at Skerne Works, Darlington, in the county of Durham, England, have invented new and useful Improvements in and Relating to Divided Driving Pulleys and the like of Sheet-Metal Construction, of

which the following is a specification.

This invention relates to improvements in divided driving pulleys and the like of sheet metal construction and has for its object the provision of means whereby great strength, light weight and low prime cost are obtained.

The invention consists in the formation of the whole of the arms ofone half of a pulley or the like from a single sheet of metal, a half bush for association with said arms, sheet metal means involving lugs for clamp; ing bolts attached to said half bush and means for attaching the sheet metal means to the arms element in conjunction with a half rim element and means for attaching the outer ends of the arms thereto.

In the drawings,

Fig. 1 illustrates a blank with stiffening ribs, suitable for forming into a three armed element, after the first shearing operation.

Fig. 2 illustrates the same blank as shown in Fig. 1 after the bending operation.

Fig. 3 is a side elevation of Fig. 2.

Fig. 4E illustrates a three armed element after the arms have been fan spanned.

Fig. 5 illustrates a half bush in perspective.

Figs. 6, 7, 8, 9, and 10 illustrate the various steps for producing the elements for the boss.

Fig. 11 is a front elevation of the stiffening plate. 7

Fig. 12 is a side elevation of Fig. 11.

Fig. 13 is a perspective view of a complete pulley constructed in accordance with this invention and Fig. 14 is a section through the rim edge drawn to an enlarged scale.

The construction of one half of a driving pulley having six arms will first be described but it is obvious that many modifications thereof may be made without departing from the spirit of th invention.

A sheet of metal of suitable length and width has four slots or notches a formed therein as illustrated in Fig. 1, the longitudinal axis a of the slots a being parallel Serial No. 418,818.

with the longitudinal axes a a of the sheet, two of the slots a extend from one end of the sheet and two from the other fora distance a substantially equal to the length of the finished arms A. To stiffen the arms A, raised ribs or ridges a may b used and when such are employed the raising thereof is. effected prior "to the formation of the slots (1. p

The sheet of metal in now folded substantially into UIshape as illustrated in Figs. 2 and 8,.the upstanding parts of the U involving the portions with the slots or notches a and the transverse joining part a being dis Y posed substantially at right angles thereto. The transverse joining part a is then curved as illustrated in Fig. lto fit the external diameter of a suitable'halfbush, B (Fig. 5)

said curving resulting in the divergence of the parts separated by the slots or notches thereby producing three substantially radial arms'A, see Fig. 4. On each side of the element comprising the arms A a segmental I plate C, Figs. 11 and 12, is attached by rivets a", which pass through the holes 0' in the plate C and a in the arms A, the segmental plates 0 having a part 0 thereof removed to accommodat the parts of the half bush B which protrude therethrough. Each of the segmentalplates C are formed with ridges or ribs 0 adapted to engage with the ribs or of the arms A and raised portions 0 for purposes hereinafter to be described. To ach of the segmental plates C after they areriveted in place is riveted an element D formed from sheet metal in the following manner A sheet of metal of suitable thickness is first blanked out as shown in Fig. 6 and includes a hole d and two notches d At a single operation the edge of the hole (1 is flanged to fitthe half bush B and the 7 ends of the projecting lugs d are turned as illustrated in Figs. 7 and .8, the final step illustrated in Figs. 9' and 10 involving the completion of the curling of the lugs d to form bosses d and the severance of the whole into two elements D D along the line d.

D. The function of the raised portions 0" of the plates is new self evident and is to enable the elements to properly bed on the plates C Without interference by the ribs 0 Thehalt bush'B is now introduced into the curved transverse joining part w'.

or the element comprising the arms A and is attached to the elements 1) by rivets 6 passing through the holes 2') in the half bush B and holes d in the elements D. By this arrangement of parts it Will be seen that each 01" the arms [a transmits its proper share of load to the bush B.' The outer ends of the arms A associated together are the elements E are rolled as shownin Figs.

l3 and 14 at e the abutting part 6 of said roll being disposed normal to the driving surface/so as to obtain a maximum of support.

To produce a complete pulley as illustrated in Fig. 14,-two halves'constructed as hereinbet'ore described are =connected by boltsF which pass through the bosses (Z and plateste which are riveted to one end of each half rim elementE at e and are provided with holes which register with holes in the end of the element E abutting and adapted to receive boltse.

l claim:

1. ln a divided driving pulley of sheet metal construction in which the Whole of the arms of one halt thereof are formed from single sheet of metahthe arrangement of a halt bush formed i sheet metal and adapted to engage both the shaft and one of the arm elements, segmentalplates riveted to the and boss elon'ients oi sheetmetal riveted to said segmental plates and said half bush.'

In a divided driving pulley as claimed in claim h the formation of a boss element from blank having two pairs of oppositely disposed lugs and an elongated hole the said hole being flanged and the said lugs being curled to form bosses, the element thus formed being divided to form two similar parts.

In testimony whereof I have signed my name to this specification in the resence of two subscribing Witnesses? EDMUND GARSIDE.

W i tnesses JOHN VVILLIAM SHAW, ARTHUR EDWIN HENRY SMITH. 1 

